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Finding the Fourth Proportional to 139,238.74, 192,149.66 and 75,576.55

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Solution

The fourth proportional to 139,238.74, 192,149.66 and 75,576.55 is: 104,295.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,238.74 : 192,149.66 = 75,576.55 : x
  2. Step 2: Convert to fraction form
    139,238.74/192,149.66 = 75,576.55/x
  3. Step 3: Cross multiply
    139,238.74x = 192,149.66 × 75,576.55
  4. Step 4: Simplify right side
    139,238.74x = 14,522,008,386.47
  5. Step 5: Solve for x
    x = 14,522,008,386.47/139,238.74
  6. Step 6: Final answer
    x = 104,295.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.